Whine after water pump and belts job
#16
My s2 did this. I adjusted the belt so that it was not in continuous contact with the idler when at stable revs. If the idler is continually spinning fast it will whine. I set mine so that the belt only came into contact with the idler when there is a sharp change in acceleration and the belt attempts to flap which is then prevented as it contacts the idler
#17
You should be able to twist the longest run of the balance belt 180 degrees with your fingers. I know it sounds too sloppy but this is the popular method. Also the idler should clear the belt by the thickness of a credit card. Good luck.